Moist banana cake studded with chocolate chips is encased in fluffy peanut butter frosting, encrusted with mini chocolate chips, and drizzled with chocolate ganache in this decadent cake.
For the chocolate chip banana cake:
2 1/4 cups cake flour
1 2/3 cups sugar
1 1/4 teaspoons baking powder
1 1/4 teaspoons baking soda
1 teaspoon salt
2/3 cup butter
2/3 cup buttermilk
3 eggs
1 1/4 cups mashed banana
2/3 cup chocolate chips
Preheat oven to 350 degrees.
Using a stand or electric hand mixer, cream together the butter and sugar until light and fluffy. Add the eggs, one at a time, then the mashed banana. Mix until well combined. In a separate bowl, sift together dry ingredients. Add the dry ingredients to the butter/sugar/egg mixture in three parts, alternating with the buttermilk, beginning and ending with the dry ingredients. After each addition mix only until just combined, and add the chocolate chips with the final flour addition. Mix just a few seconds with the mixer, and finish blending together by hand, scraping the sides and bottom of the mixing bowl to ensure everything is evenly mixed.
Divide the batter between two 9-inch round cake pans, lined with parchment paper and greased. Bake 35 to 40 minutes until cake springs back to the touch and a toothpick inserted into the center comes out clean. Allow cakes to cool in the pan for 10 minutes, then run a knife around the edges of the cakes to loosen the sides and turn them out onto a wire rack to cool completely before assembling the cake.
For the peanut butter frosting:
2 1/2 sticks unsalted butter, softened
1 1/3 cups creamy peanut butter
3 tablespoons cream
2 1/2 teaspoons vanilla extract
1/8 teaspoon salt
2 1/4 cups powdered sugar
Using a stand or electric hand mixer, blend together butter, peanut butter, cream, vanilla, and salt until well combined and very smooth, about 4 minutes. Add in the powdered sugar gradually, and mix on medium high speed until fluffy, approximately 4 minutes.
For the ganache drizzle:
1/2 cup chopped dark chocolate or chocolate chips
1/2 cup cream
1 tablespoon butter
Heat cream and butter in microwave until just boiling. Pour over chocolate and allow to sit for 10 minutes (avoid the temptation to stir it too soon). Whisk to combine until smooth.
Cake assembly:
2 layers chocolate chip banana cake
1 recipe peanut butter frosting
1 bag mini chocolate chips
1 recipe chocolate ganache
Spread mini chocolate chips on a tray. Stack the cake layers with frosting sandwiched in the middle, and coat the sides of the cake with frosting, leaving the top bare. Carefully lift the cake, placing one hand on top of the cake and one on the bottom. Turn the cake on its side, like a wheel, and roll it on the tray of chocolate chips, so that the sides of the cake get a nice coat of chocolate chips. Place the cake on a cake plate, and frost the top of the cake. Drizzle chocolate ganache over the top of the cake (a condiment bottle works great for this). Finish cake decoration by piping a border along the top and bottom edge of the cake.
A few recipe notes:
Cake flour. I like to buy small quantities from the bulk food section at my grocery store. it tends to clump together, so sifting is critical! Unless you like to bite into gummy clumps of flour in your cake. My vintage sifter broke in my last move, so I just use a mesh sieve and shake my dry ingredients through and into the mixing bowl.
Buttermilk. Did you know it doesn't go bad in the fridge? In a pinch you can sour regular milk (or milk substitute like almond milk) by adding a teaspoon of vinegar or lemon juice. You can also keep powdered buttermilk in your pantry, but since the real stuff can last in your fridge for forever, you might as well keep it on hand for baking, or for fluffy delicious buttermilk pancakes. It really does taste better.
Peanut butter. Really seriously, don't use the delicious natural stuff. If you're a peanut butter purist, just get a jar of the processed stuff just to use for recipes like this one.
Butter. Use unsalted butter. It is hard to judge how much salt to add to a recipe when using salted butter, and the taste is especially noticeably in frosting if over salted. If you do use salted butter, be cautious in how much salt you add, and taste along the way to make sure you don't add too much.
Cake pan prep. Lining your cake pan will make it so much easier to pull it out of the pan to cool. Simply trace your cake pan onto parchment paper, wax paper, or even printer paper, cut it out, and place it in the bottom of your pan. I like to spray my pans with nonstick spray before putting the paper in, then I spritz a little on top of the paper, which makes it easier to get it off the bottom of the cake. Brushing softened butter into the pan also works like a charm.
Freezing your cake. I often like to make my cake a day or two in advance. After they have cooled completely, I wrap each layer in plastic wrap and freeze them. Just make sure to put your layers on a flat plate or tray so that they don't get misshapen. Frozen cakes are easy to work with. They won't break apart as you frost and decorate, and won't give off as many crumbs. Just make sure there's enough time for the cake to thaw before you serve it.